Type-writing machine.



G. G. GOING.

TYPE WRITING MACHINE.

APPLICATION FILED APR. 6. 191a.

Patented. Oct. 22,

WITNESSES n i a an one.

GEORGE OULD GONG, F MEDLETOWN, CONNECTICUT, ASSIGNOR TO THE NOISELESS z" comm, or W DEE-TOWN, CONNECTICUT, A CORPORATION 015 Tarn-Irma- Macnmn.

Speeifimtion of Letters Patent.

Patented @ct. 22, 11am.

V Toall whomz'tmaycdnccrm' I Be it known that T, Gnoncn Gonna Gems,

a citizen of the United States, residing at Middletowmin the countyof Middlesex and State of'Connecticut, have invented certain new and useful Improvements in'llypeewrlting Machines, of which the following 1s a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to typewriting machines, and more particularly to improved type actions therefor.

One of the objects of the invention is to provide a simplified and reliable type action adapted to transmit movement from a finger key lever to a .type carrier to eiiect substantially silent printing.

A further object is to provide a practical and eficient train of connections between a key lever'and a pivoted type carrier and to associate therewith means independent of the key lever and paper platen to limit printing movement of the type carrier and to permit rapid operation of the machine.

Other objects and advantages will in part be noted hereinafter in connection .with the description of .the accompanying drawing, which illustrates a typical embodiment of the invention. 7 r

The invention accordingly consists in the features of construction; combinations. of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the aplication of which be indicated in the ollowing claims.

Referring more'particularly to the drawing, there is represented a typewriting machine e 1, having at its fore part a key board and at itsupper rear part a paper roll 2, mounted on a traveling carriage adapted for longimuilline movement and 1' vertical shifting to permit difierent printing. A flat metal platen 3 is .u I r l adjacent the platen roll plane of the am's of the latter, and 1 mechanism is employed to carry the pape rard below the roll and upward in on the paper against the platen 3 as a back- 2 in the hotal.

ifig. This structure of the paper roll and platen is a characteristic of the Noiseless typewriter, for which the embodiment of the invention shown in the drawing is particularly applicable, although it is :to be I understood that features of the invention are as well susceptible of use with various other styles of machines. v

The finger-key levers 4 are disposed horizontally at the base of the machine and provided with character caps in the key-board, and are pivoted at their rear ends on one or more cross bars 5 or other suitable devices adjacent the rear of the machine. The key levers are guided vertically in a comb memher 6 adjacent the keyboard, and leaf springs 7 suitably mounted, are arranged to engage cam lugs 8 adjacent the pivotal axis of the key levers and normally urge the latter to elevated position against a cushioning stop 9 extendingeacross the machine adjacent the comb mem and each comprises a bar 10 pivoted at its lower end on an axis llassociated with a segment support 12. The. bar 10 carries at its upper end a type piece 13 having preferably two type characters 14 and 14c for difierent case printing. The forward lower edges of the type carriers are curved at 15 for engagement by a complementary curved cam edge 16 of the lower arm of a bell crank lever' 17 pivoted at 18 on an aids associated with a cross beam 19 of the machine. The

.fore horizontal arm of the bell crank lever with the platen roll 2, a curved cross brace .24, and a connection therefi'om to the free end of the type carrier is employed to limit movement of the latter when actuated to efiect printing. This connection, as shown, comprises two links25 and 26 pivoted together and attached at their ends to the type mrrier adjacent the type piece 13 and to a r 6. The type carriers are disposed radially about a central printing point block 27 mounted for longitudinal adjustment on the cross frame 24. The links 25 and 26 are designed to be straightened as an extended toggle, when the type carrier is moved to print, and the protracted or printing limit of the type carrier is therefore established independently of the platen and the key lever. Such limit, also, may be readily adjusted through the medium of adjusting screws 28 associated with the blocks 27.

v A cushioning pad 29 is mounted above the Q shown in the drawing, the key lever being urged upward by spring 7 and the type carrier being urged away from the platen by spring 21. Upon depression of the key lever to effect printing, moyement is transmitted through link 20 and pivoted bell crank lever 17 to the type carrier, the engaging edges of the bell crank lever and type carrier having a rolling or creeping point of contact in such a relation that upon depression of the key lever the speed of the type carrier is progressively increased. As the type carrier swings toward the platen, links 25 and 26 assume straightened position and positively limit the rearward throw of the type at a point sufficient to insure proper impression, but to prevent the type carrier impacting with the paper with a noisy hammer blow.

Overthrow of the toggle 25, 26 is prevented by engagement of the link 25 closely adjacent its fixed axis with the leaf spring 30, the latter also tending to insure an immediate breaking of the tog 1e and return of the type carrier to retracte position.

A suitable escapement mechanism for the traveling carriage is, of course, provided for actuation by a universal bar associated with the key levers, or some moving part in the type action, and by a space bar. The various other conventional features and devices are also, of course, incorporated in the machine.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departin from the scope thereof, it is intended that a l matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. 1

Having described my invention, what I claim as new and desire to secure by Letters Patent, 1s t 1. In a typewriting machine, in combination, a platen, a pivoted type carrier, a key lever, an operative connection between said type carrier and said lever to move the former to effect printing, and means independent of said connection to limit the printing stroke of said type carrier without impact and substantially independently of said jplaten.

2. In a-typewriting machine, in combination, a platen, a pivoted type carrier, a key lever, an operative connection between said type carrier and said lever to move the former to eflfect printing, and means independent ofsaid connection to limit the printing stroke of said type carrier without impact and substantially independently of said platen and of said lever.

3. In a typewriting machine, in combination, a platen, a pivoted type carrier mounted to swing to print against said platen but normally urged away from the latter, a rigid member arranged on the side of said type carrier away from said platen, a con-. nection between said member and said type carrier to limit movement of the latter toward said platen, and means independent of said connection to actuate said type carrier to print.

l. In a typewriting machine, in combination, a platen, a pivoted type carrier mounted to swing toward said platen but normally urged away from the latter, a rigid member arranged on the side of said type carrier away from said platen, a toggle connection between said member and said type carrier which, when straightened, limits movement of the latter toward said platen, and operating means to move said type carrier to print independently of said connection.

5. In "a typewriting machine, in combina; tion, a platen, a pivoted type carrier, means comprising a toggle having one member attached to said type carrier adjacent its free end for limiting movement thereof toward said platen, and operating means including a member to transmit force to said type carrier adjacent its axis of motion.

6. In a typewriting machine, in combination, a platen, a pivoted type carrier, means type carrier and said lever including a mem her to transmit force from the latter to the former adjacent its axis of motion, and a toggle including a link attached to said type carrier adjacent its free end, said toggle when straightened determining the limit of' the printing stroke of said type carrier.

8. In a typewriting machine, in combination, a platen, a pivoted type carrier, a rigid member on the side of said type carrier type carrier and having a depending rear-' ward moving arm in rocking contact with the latter, a vertically disposed pull wire connectlng the other arm of said bell crank lever with said key lever, and resilient means lever, an operative connection betweensaid type carrier and said lever to move the former to efl'ect printing, and a toggle having one link connected to a stationary part and independent of said connection to limit the printing stroke of said type carrier.

12. In a typewriting machine, the combination set forth in claim 11 further constructed andarranged so that said toggle when straightened extends substantially parallel to the direction of the final movement v of the type to print.

13. In a typewrlting machine, in combination, a platen, a rigid, pivoted type carrier, a key lever, an operative connectlon be' tween said type carrier and said key lever to move the former to effect printing, and means comprising a toggle independent of said connection to limit the printing stroke of said type carrier.

I 14. In a typewriting machine, in combination, a platen, a pivoted type carrier, a key lever, an operative connection between said lever and said type carrier adjacent the axis of motion of the latter, and means independent of said connection pivoted to said type carrier adjacent its free end for limiting movement thereof toward said platen.

15. In a typewriting machine, a platen, a rigid, pivoted type carrier, a key lever, an operative connection between said type carrier and said lever, and a toggle independent of said connection having one link p1v-,

oted to a stationary part and another link pivoted to said type carrier and arranged so that the links when straightened extend at substantially right angles to said type carrier.

16. In a typewriting machine, a type action including, in combination, a pivoted typecarrier normally disposed in retracted position and adapted to swing toward the platen to effect printing, a key lever, an operative train of connection between said lever and carrier to swing the latter at accelerating speed toward the platen, and a toggle' connected to said carrier and movable by the latter to extended position for silently limiting the movement of said carrier toward the platen.

17. In a typewriting machine, a type ac.- tion including, in combination, a pivoted type carrier normall disposed in retracted position and adapte to swing toward the platen to efi'ect printing, a key lever, an op erative train of. connection between said lever and carrier to swing the latter at accelerating speed toward the platen and permit return movement of said lever independently of said carrier, and'a toggle connected to said carrier and movable by the latter to extended position for silently limiting the movement of said carrier toward the platen.

In testimony whereof I afiix my signature, in the presence of two witnesses.

GEORGE GOULD GOING. Witnesses:

, D. B. WESTIN,

ERENA K. AILEN. 

